Eustace Wentworth Roskill, Baron Roskill PC, JP (6 February 1911 in London – 4 October 1996 in Reading, Berkshire) was a British lawyer and public servant.
Roskill was the youngest of four sons of John Roskill. His mother Sybil was the daughter of the traveller and politician Ashton Wentworth Dilke. Roskill's older brother Stephen was a captain in the Royal Navy. He was educated as an exhibitioner at Winchester College and went then to Exeter College, Oxford, where he graduated first class with a Bachelor of Arts in 1932, winning an honorary scholarship in modern history. Roskill studied afterwards as a Harmsworth Law Scholar at the Middle Temple and was called to the bar in 1933. Three years later he obtained a Master of Arts and thereafter worked at the Commercial Bar.
With the begin of the Second World War in 1939, Roskill, having previously suffered from tubercolosis, was not conscripted into active service, but became employed at the Ministry of Shipping until 1941 and subsequently at its successor the Ministry of War Transport until the end of the war in 1945. He was nominated a Justice of the Peace in 1950, assigned to Hampshire and became deputy chairman of the county's Quarter Sessions in the year thereafter. Roskill was appointed a Queen's Counsel in 1953 and chaired the Quarter Session from 1960. A year later he became Commissioner of Assize, serving in Birmingham and was elected a bencher by the Middle Temple.